Moulds for metal castings



IRI/@7157; 0MM ML.

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ADAM WEABER, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 92,67 7, dated Jzdy 13, 1869.

.IMPROVEMENT IN APPARATUS ron MAKING MoULDs I'oR METAL CASTINGS.

The chedule referred to in these Letters Patent and making of the-same.

To all whom fit may concern lic it known that 1, AnAnWnAnnn, of the city of Philadelphia, in the State of Pennsylvania, have iuvented a anew and usel'ul AIlnprovements in, and Apparatus for MouldingPatterns iu Sand for Castings; and l" do hereby declare that the following is a full, clear, and exact description of the salue, reference being had to the accompanying drawings, making a part of this specification, in which a circular arrangement of a series of feurlike moulding-devices is shown,

Figure l being a representation of the upper side of the mouldiug-table, or platform of the series;

Figure 2, a like reprcsentatimi of the parts below the said platibrn1,(u' below the dotted horizontal line x-y of fig. 3, a part of one of the moulding-series being removed therefrom;

Flguret, a'front elevation of one of thc-mouldingseries, with a section of a pattern as being moulded in a detachable half-fiask applied to the platform;

Figure 4, a verticatrznlial section through one of the pistons of the moulding-series, and the devices foreperating and controlling the same;

Figure 5, a central longitudinal section of one of the several two-part ilasks required in moulding; and

Figures (i, 7, and S, representations of three certain distinct parts-vof each one of the moulding-series detached.

Like letters of reference indicate the same parts when inthe different figures.

The object of my invention is to facilitate and expedite the moulding of patterns in sand for castings; and

'Ihe nature of my invention consists in simultaneously charging the iiask with sand, making the impression of the pattern therein, and withdrawing the pattern by a single stroke of a piston, or its equivalent.

My invention also consists in the construction and arrangement of certain mechanical devices, substantially as hereinafter described and speciiied, whereby the said piston, or its equivalent, is causedto charge the iiask with the sand, make the impression of the pattern therein, and withdraw the said pattern at one operation or stroke of the said piston, or its equivalent.

Referring to 'the drawings,

A is the 1llonldiiig-plattbrm, supported by columns I-l, upon a substantial base, C.

1)-1), the pistonhe:uls, and 1)-Dtheir'stcms or rods.

lil-1*), boxes or eases in the platform A, for receiving the piston-heads I), and the sand in which' the patterns are to be moulded.

F-F, the patterns, detachably fixed on the pistonheads.

(-G, four horizontal shafts, each of which has one of its bearings in the support H, and has fixed on that end a disk, 1, which has a wrist-pin, t",-.ncar its periphery, by which the said disk is connected with, and,

like a crank, operates its respective piston through the media of a sliding block, J, and transverse slot Ii, in Ithe broaderpart ofthe piston-rod D, whilst the opposite end of the said shaft G has its bearing in a stationary centre-post, L. l

Each of these shafts, G, has, on its inner end, a loose bevel-piniou, M, and between the latter and the disk I, a sliding clutch, N, which receives a fin, g', fixed on the said shaft, (sce iig. (3,) and thereby gives rotary motion to the shaft when the said clutch N is slipped inward, intc'comicc'tion wlt-h the pinion M on thc said shaft, by means of a barril-lever, P,'which is connected with a spring, O, that cmbraces'i'he clutch N, anda foot, O', whichserves as a trcadlc, whereby the pistonrod D', on itsdescent, throws the clutch N out of connection with the pinion.

Each of the pinions M gears with the upper side of a horizontal bevel-wheel, Q, which is .loose on the centre-post L, and is rotated b`y a bevel-pinion, It, which gears with the under side of Q, andv is iixcd on a horizontal shaft, which is rotated by meansr of the vertical wheel R" on the saine' shaft, and the pinion S 011 the shaft of the balance-wheel T. (Sec fig. 2.)

Each piston-head, D,'ef the series, fits accurately in its 4respective case E, and' has its lower edges d"d, (sec fig. 4,) made chisel-shaped, so as to clear the sand from the inside surface of the case as the head descends, the piston-rodY D being supported in a vertical position, cent-rally, under its head I), and so that it will slide, accurately, up and down in a hole in its stationary support d. (See figs. 3 and 4.)

When the piston is at its lowest position, the upper surface of its head D, forms the bottom-of its respective case E, and the lower end of its rod D bears on the treadlc O', so as to draw the clutch N out of connection with the pinion M, the facing ends of the saidv clutch N and pinion M, having respective projections a n' and 1a' m', (sce fgs. 4,- 7, 8,) whereby they will interlock with each other when the clutch is pushed inward by means 0f the hand-lever P, and become separated again when the treadle O is pressed downward bythe piston-rod D. l

The position ofthe wrist-pin t', in the disk I', is such that when atits highest point, the upper surface of the piston-head D will be in the same plane with the upper surface of the moulding-platfbrln A, and when at its lowest point, the lower end of the rodD' will draw the .clutch out of connection with the pinion BLby pressing down the treadle O.

The patterns F F, with their moulding-plate, are detachably secured on thc upper surfaces ofthe respective piston-heads, so that others can be substituted when required.

The asks (see fig. 5) are cach cast of metal, in two like halves U U, so that when adjusted together in the usual manner, thc flask will form a vclose case, with -the exception of the necessary sprue-hole u and ventholcs '1N-u, and so that the inner sides and ends will slope inward, and then round off into the flat vented side, substantially as represented in the figure.

ln the present instance the flank is represented as cast, with outside projections V-V, to support it on one end whilst the metal is being poured into the sprue u' in the other end. 4

The meeting-edges of the two parts of the flask, have also flanges, VV-V,4 projecting horizontally outward around the same, whereby they can be readily secured to each other, and also to the plat-form A, directly over, and so as to entirely cover the mouths of' the cases E, as shown in fig. 3. The relative capacity of each half; U, of the flask, and of the case E, issuch, that an evenly-filled case of the loose sand, whenthe pstondiead is at its lowest position, will exactly fill thchalf flask U with the moulded or pressed sand, as represented in fi". 3.

Thelialfflasks U are each detachably secured over the respective cases E, in the platform A, by means of two l1orizontally-moving racks c' c', operated on the outside of the case E by a pinion, c, (sce dottedlines fig. 3,) and a hand-crank, c.

The projecting ends of the racks c c have elbows extending back to a slot, a a', in the platform, and carry clutch-blocks e4 c, which project up through the said slots, near each end ofthe flask U, in such a lnanner that by rotating the crankdialulle a', the said .clutch-blocks 'c will be simultaneously caused to catch over the projecting edges of the flask, and hold itfirml y down upon the platform A, or release the saine, as occasion may require.

The two halves of the flask are each provided with -lugshaw Izt u', and studs a amare fixed in the platform, around the cases E, whereby the said parts of the flasks are adjusted with facility and accuracy over the cases E.

Operation.

supposing the piston-rods D are all downupon the treadl'cs O', and therefore the clutches N disengaged from the pinions M, if rotary motion be now-given to the balance-wheel shaft, the horizontal bevel-wheel Q will-be rotated around the centre-post L,and consequently each of the pinions lll will be simultaneously rotated aroundits respective shaft G, and in this nia-nner these parts are to he continually moving.

The attendant of each case ll nowl proceeds (independently of each other) with the mouldngproeess.

A' description ofthe mode of proceeding with one case will applyro all.

The tempered 1noulding-sand is filled loosclv into the open case li), until even' with the surface of the platiln'm A, the half flask is then adjusted overt-he filled case, and secured by operating the hand-crank c, so as to Vcause the clutch-blocks e c to clamp it firmlydownupon'the platformAasshowninfig. 3. He then presses inward the hand-lever P, which, carrying iuwardthe springl O, causes `the clutch N to slide inward `and interlock with 'the rotating pinion M, and consequently to be carried around with it, and thus give rotaryniotion to the shaft G and its disk I, and also an upward motion of the pistoulhead D, in th'e rase E, until` the upper surface of the said piston has reached the upper surface of vthe platform A, thus pressing the loose sand properly ilu-the half flask U, above it, and at the same time making a perfect im- `pression of the pattern F in the said sand, when 'the piston, with the pattern thereon, is caused to descend until the lower end ofthe'piston-rod D', presses downward the treadle (V and thus withdraws the clutch N out of contact with the rotating pinion M, and stops any further lnovelnent of. the' said piston.

The attendant n ow detaches and removes the moulded flask, applies" another, rcvers'ed, and proceeds as before, then joins the two moulded halves'of the flask, and so conthmes until' the time arrives for putting in the cores and casting, as heretofore.

It will be seen that the inode of moulding patterns in sand for castings, consisti'ngin simultaneously charg ing the flasks with the sand, making the ilnprcssion of' the pattern therein, aml'withdrznving the pat-tern by a single stroke of a piston, or its-equivalent, as described, will greatly facilitate .and expedite the operation of moulding all small articles requiring only a two-part flask for the purpose, and especially such articles as turns, elbows, cocks, cross and branch-joints, required by phnnbers, ygas-litters, and tube-manufacturers, and numerous other castings required=in the arts.

Should the withdrawing of' the pattern` by the return-stroke of` the piston, fail to leave the impression in any manner imperfect, the attachment of' the said pattern to the piston-head may be such, that when the piston retires, the pattern will remain in the sand, to be afterwards vcarefully removed by lland. lhis may be found desirable sometimes .in very nice and delicate work. ,y

This arrangement is illustrated in fie. 9 of drawings, where the pattern-bearing bed-piece, is provided with suitable pressure-pins z, which, acting against the insides ofthe half flask V, retain the said bedplate with its patterns as the pistonretires I do not claim attaching the pattern to the pistonhead, and causing the impression of' said pattern to be iliade in the sand hy the forward motion of the said piston, for that is not new.

I do not claim, broadly, filling the flask with sand by machinery, for that is not new, and has been set forth in various inventions heretofore patented.

It will also be seen that the construction and arrangement of the different parts of the apparatus are co1nparatively simple, easily managed, and not `liable to become deranged in use.

The structur and operation of my machine do not require that the sand-receiving cases E and the piston D should be arranged upon a circular` bench. They may, if found more convenient, be arranged in line along the side of a moulding-room, and-operated by an extended shaft.

Having thus fully described my invention,

lVhat l claim as new,and desire to secure by Letters Patent, is confined to the following:

l. Moving at one and the same time both the sand the piston, when the said pattern is attached to the piston-head, so as to be withdrawn from the sand by the direct return-stroke of the' said piston, all the said parts being constructed and arranged to operate substantially as and for the purposes specified and set forth.

2. I claim, in combination with the case E and platform A, arranged as described, the two racks c c, the pinion c, the crank c', and the clutch-blocks c, the said parts heilig arranged and combined to operate together, substantially as and for the purpose described.

3. I claim the spring-extension 0 ofthe treadle O', in combination with the clutch N and hand-lever l, constructed and arranged substantially as described, f'or the purpose of enabling the attendant to interlock the said clutch N with the'pinion M, as occasion may require, as described.

4. I claim the construction andrclative arrangement of the clutchN, spring O, treadle O', and piston-rod D', whereby the said piston-rod, asit reaches its lowest position, presses the said trcadle downward, and thus causes the said spring to draw the said clutch ont of' connection with the rotating pinion M, substantially, as described.

Witnesses BENJ. MonrsoN, WM. H. Momsos.

and the pattern to the flask by the forward motion ol ADAM VVEABER. 

